We have found 2 software records in our database eligible for .odc to .xls file format conversion.
odc to xls conversion is doable in the sense that it is indeed possible to import OpenDocument charts (.odc) and place these as objects to MS Excel worksheets, or rather do that in OpenOffice/LibreOffice and save the resulting file as .xls spreadsheet.
But it might as well be that you were in fact looking for ods to xls conversion, which is common resaving between OpenDocument and MS Excel spreadsheet, and just made a typo.
Updated: August 28, 2023
ODC
Files with odc file extension may be found as charts prepared using one of the ODF based office suites, including the Apache OpenOffice.org.
XLS
Files with xls extension are best known as spreadsheets from Microsoft Excel. A spreadsheet is basically a grid of cells sorted in rows and columns. Each cell can contain text, numeric or formula data. Excel XLS spreadsheets can be opened in most other similar programs, such as OpenOffice.org Calc.